Heat-regulating apparatus.



PATENTED FEB. 5, 1907.

N. E. NASH. HEAT REGULATING APPARATUS.

APPLICATION FILED NOV. 21,1905.

- Maid- 01;

NATHAN E. NASH, F TORONTO, ONTARIO, OANADAL HEAT-REGULATiNG APPARATUS-No. seegoes.

Specification of Letters Patent.

Patented Feb. 5, 1907.

Application filed November 21, 1905.. Serie1No-288,353.

To all whom it may concern.-

Be it known that I, NATHAN E. NASH, o

the city of Toronto, in the Province of On-' ratus' in which the Openingand closing of the' radiator-valve, or that valve which adnits steam orhot water to a radiator, is effected, primarily, by a thermostat whichin its rr.ove ment consequent upon a chan e in tempera ture of the airsurrounding the thermostat controls the adnission to and the dischargeof air from a diaphragm ada ted to either open arran ed, the reversemovement being effecte by a spring.

The principal'object' of the resent invention is to reduce "the expeniture of compressed air used asthe motive force to actuate the.diaphragm of the radiator-valve;

and the invention consists in a peculiar eon-' struction of certainair-passages in the heatre 'ula'tin apparatus and the controllingvalvesus bd in connection with the said airpassages, whereby directcommunication between the tank in which the compressed air is stored andthe atmosphere is only 1130- mentary or during-the period oftimerequired by the said valves to pass from one extreme position toanothera period so minute as to be hardly appreciable.

In the descri tion of the improved apparatus which fol ows reference ismade to the accompanying drawings, forming a part hereof, and in which-Figure 1 is a vertical side section ofthe improved heat-regulatingapparatus, andFig.

2 an exterior front view of the same.

Referring now to the drawings, 1 is a shell having the inlet and outletnozzles 2 and 3, adapted for connection by means of pipes,

(not shown,)' respectively, to a source. of supply of air underpressure, such as a tank, and

" the motor (not s own) whereby the radiatorvalve'is operated in onedirection, and in the resent case that in which the valve is closed. Thebody of the shell 1 is shown as in two parts a and b, the former, whichis provided with the nozzles 2 and 3, being designed. as a permanentfixture on the Wall of the'building or close the radiator-va ve, as maybev and'the latter removable. The two parts a andb are held together bymeans of screws. (Not shown.)

4 is a valve-chamber situated in part b of the shell 1 and incommunication with the nozzles 2 and 3 bymeans of the air-ducts c and(1, respectively. Thesaid valve-chamber is covered by the screw-plug 5,which is provided with a polygonal head, whereby the plug is screwedinto position withthe inner surface of its head closely in contact withthe outer surface of the shell. 'The inner end of the ductc is adaptedas a valve-seat e, and the plug 5, which has a centralaperture, f, issimilarly arranged, the valve-seat being de-- noted by g. a

- 7 is a double-faced valve situated in the valve-chamber 4, having astem h, which passes loosel through the aperture f, and provided wit adisk 9 at its end.

10 is an air-chamber situated exteriorly of and at the front of theshell 1. It is formed by a ring i and a recessed head 7', and the twoparts are held to the shell 1 by means of' screws k. I

12'is an extremely thin slightly-dished dia- P g stance, .as hard- 00per-held tlghtl between the ring '6 an the recessed hea j by screws k,and the disk 9 of the valve-stemh is 8o preferably of metalsuch, for mincontact with the inner and dished surface of the said diaphragm when thevalve 7 is on the seat e. i v 13 is a second valve-chamber in the part bof the shell 1. a It contains a valve 15, which, like the valve 7, isdouble-faced and is prosults hereinafter described.

a transverse area 18 is a passage hav ng the stern m passes, isconsiderably 9.5

which-is much less than that of the aperture 72}, leading from the ductc to the second valve-chamber 13, and at its endis formed a seat for thevalve 15 The second seat for the valve 15 is at the inner end of theaperture n.

19 is a second passage which connects the air-chamber 10 at a pointexterior of the diaphragm 12 with the valve-chamber 13 and is constantlyin communication with the said chamber and at times open to theatmosphere, as hereinafter described.

is a curved thermostatic blade constructed, 7 preferably, of plates ofsteel and zinc, one end of which is secured in any suitable'manner tothe part b of the shell 1, and the other and free end provided with ascrewsleeve 0, having a comparatively coarse exterior thread and a muchfiner internal thread.

' 22 is a screw within the sleeve 0, the end of which is in contact withthe end of the valvestem m when the apparatus is in use. l

- 23 is a cock-key whereby the duct 0 may be closed to prevent theescape of compressed air from the air-tank in case the part b of theshell, with its attachments, should have to be temporarily removedforrepair.

24. is an indicating finger or pointer secured to the sleeve 0, whichmay be moved circum-. ferentially by hand to alter the position of theend of the screw 22 with respect to the end of the valve-stem m, and p adial suit ably marked with numbers representing different temperatu es.

The whole apparatus as described is covered by an ornamenal open-workcasing, whereby it is fastened to the wall of the room in which auniform and predeterminedtemseen that in the seating of the valve 15,as, described, the air which had been confined perature is to bemaintained. This casing, however, is omitted from the drawings, as itembodies no part of the present invention.

The operation of the apparatus is as follows: Supposing-the variousparts of the apparatus to be arranged with respect to. each other, asshown in the drawings, with the radiator-valve held open by its spring,and that the temperature of the surrounding atmosphere is to bemaintained at the sleeve is turned until the pointer indicates 70 on thedial. The screw 22 is then withdrawn from contact with the valve-stem muntil the atmosphere of the room reaches the predetermined temperatureof 70, when the said screw turned in a reverse direction until the valve15 closes the passage 18. It'will be above the diaphragm 12 in thechamber 10 has now free access to the outer air by means of the passage19, the valve-chamber 13, and the aperture n. Consequently noresistanceis offered to the outer movement of the said diaphragm, ashereinafter described. The valve 15 being seated as described, the fullpressure of the compressed air acts on'the valve 7 and causes thatdevice to be forced from its seat e and brought into contact with itsouter seat g, the dia hragm 12 being lifted in the movement. hecompressed air then passes through the duct d to the diaphragm of theradiator-valve, and the valve, which up to this time hadbeen open, isclosed,

thus preventing further admission of steam.

to'the radiator. As soon as the temperature of the air surrounding theapparatus is slightly lowered by radiation the contraction of the zincelement of the thermostatic blade causes the pressure of the screw 22 onthe valve-stem m to be reduced and the valve -15 is unseated. I havebefore stated in subaperture '11,, and 15 the area of the stem m of thevalve 15, and that the air-pressure is ten pounds per square inch. Whenthe valve 15 has closed the passage 18, the force necessary to keep thevalve seated would be represented by 100, which figure is obtained bymultiplying the area 10 of the passage 18 by the pressure per squareinchviz., 10thus 10 X 10 100; but the moment the valve is unseated it issubjected to a pressure represented by 150, this figure being'arrived atby multiplying the area 15 of the valvestem by the air-pressure of tenpounds per squareinch, thus: 15 X 10 150. 1n this case the area of theaperture 6 niust not be takeninto consideration. The valve 15 is thenmoved rapidly outward and suddenly closes the aperture n, and the end ofthe thermostatic blade 20 being elastic is pushed outward in themovement through the medium of the screw 22. As soon, however, as theaperture 71. is closed, the area of the valvestem m ceases to be afactor in the operation and has not to be taken into consideration.Consequently the valve 15 is held to its second or outer seat by apressure represented vby 200 and securely held in' its new posi tion, orthat shown in the drawings. The pressure 200 is found by multiplying thearea 20 of the aperture n by the pressure 10, thus: 20 X 10 200. ,Itwill be understood that when the aperture n is closed by the valve 15communication between the outer surface of the diaphragm 12 and theatmosphere is suspended, and the fullforce of the compressed air acts onthe said surface, which causes the diaphragm to move inward, thusseating the valve 7 on its seat e, whereby the duct 0 is again closedand the air which had been keeping the radiator-valve shut escapesthrough the channel 27, thereby admitting of the action of the spring,which then opens the radiator-valve. From the foregoing description itwill be understood that practically no air escapes directly from theair-tank, and the only air that does es cape is that which is confinedat each opera- Iio tion of the apparatus above'the diaphragm apparatusthe room has risen'slightly above 70 a reverse action of thethermostatic blade takes place, with the result that when the pressureof the screw 22fupon the valve-stem m is increased beyond 200 the valve15 is un-v seated, and then, in view of the difierential areas of thestem m and the aperture n, the

resistance is lowered from 200 to 150, which change ractically assiststhe bladein effecting the cibsure of the passage 18. The, is now in thecondition injwhich steam is again out ofl? from the radiator, and itremains cut ofl until the temperature falls I below the predeterminedpoint.

I claim as my invention' I 1. In aheat-regulating apparatus comrising avalve-chamber-having a assage eadingtherefrom to a source of supp yofair under pressure, and an aperture extending from the saidvalve-chamber to the outer air, the transverse area of the passa 'e' be"less than that of the aperture, a oubleaced valve situated within thesaid valve-chamber having a stem which extends through the a erture tothe outer air, and a thermostatic b ade to directly actuate the saidvalve through the medium of itsste'm, andin its vibrationclose eitherthe said passage or the outletraperture, substantially as specified.

2. In a heat-regulating apparatus, ashell having an inlet and an outletair-duct, which ducts converge in a valve-chamber, an airchamber ncommunication with the valve over the end of the valve-stem, combinedwith a second valve-chamber having an airescapea erture and apassageleading to the I outer si e of the said diaphragm, adouble 45 facedvalve situated within the second valve chamber having a'stem which assesthrou h the said air-escape aperture, t e two doubifaced valves coactingto prevent a continu ous escaEe of air from the source of air-sup-. o

- 1 to t e atmosphere, and a thermostatic lade which i its vibration dueto chan e in temperature o the air, operates to esta lish communicationbetween the inlet-duct and v the air-chamber at a point above the dia- 55 phragm, or "to cutofi such communication and expose the outer side ofthe diaphragm to the air, substantially-as specified.

" NATHAN E. NASH.

Witnesses: c

THOMAS G. HULL, WM. T. HOWARD.

leading-to the air-chamber and a 40

